Investigation of Magnetic Hysteresis Properties of (Sm0.8Zr0.2)(Fe0.72Co0.24Ti0.04)10–12 Melt-Spun Ribbons

The structure and magnetic hysteresis properties of nanocrystallized melt-spun ribbons with composition (Sm0.8Zr0.2)(Fe0.72Co0.24Ti0.04)z ( z = 10 – 12) are studied. It is shown that substitution of a part of iron in the composition of the alloy by cobalt raises substantially the Curie temperature but almost halves the coercivity. The decrease is connected with growth in the volume fraction of the α-(Fe, Co) soft magnetic phase and incompleteness of the process of ordering of the ThMn12-type phase during annealing at 875 – 900°C. In contrast to the rapidly hardened alloys not containing Co, hydrogenation of the of (Sm0.8Zr0.2)(Fe0.72Co0.24Ti0.04) RHA powders is not accompanied by absorption of hydrogen and growth of the magnetic hysteresis properties.

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    The x-ray diffraction studies and the measurements of the magnetic properties were performed at the Collective Use Center of the Mikheev Institute for Metals Physics of the Ural Branch of the Russian Academy of Sciences, Ekaterinburg.

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    For simplicity, we will name the phases with structural types TbCu7 and ThMn12 phases 1:7 and 1:12 respectively.


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Correspondence to A. V. Protasov.

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Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 9, pp. 26 – 31, September, 2020.

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Protasov, A.V., Popov, A.G., Gaviko, V.S. et al. Investigation of Magnetic Hysteresis Properties of (Sm0.8Zr0.2)(Fe0.72Co0.24Ti0.04)10–12 Melt-Spun Ribbons. Met Sci Heat Treat 62, 566–571 (2021).

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